Appaeattts foe casting spiral coeeitgated pipe



Oct. 1'5, 1929.

APPARATUS Filed July 1l, 1928 D. B. DIMICK FOR CASTING vSPIRAL CORRUGATED PIPE 5 Sheets-.Sheet /f a ZZLaf/ ,Q1/ D 1 z Af 'e2 27 l v .9 l o 0 ih 28 fk5 zo l 5 *7 A e0 O lll 64187 g,

A TTORNEYJ' Oct. l5, 1929. 0. a. DlMlcK 1,732,183

APPARATUS FOR CASTING SPIRAL CORRUGATED PIPE med July 11, 1928 5 sheets-sheet 2 [NVEN TOR.

ATTORNEYJ Oct. 15, 1929. D. B. DlMlcK 1,732,183

APPARATUS FOR CASTING SPIRAL CORRUGTED PIPE Filed July 11. 1928 Y ssheets-snet 3 I' :i1|IIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIHIU H!l IH /7 I Illh Iii vih

numnlunnn" 'uw' v mw .BMM

ATTORNEYS JWM, H@

9 D. B. DlMlcK `1,732,183

lAPPARATUS FOR CASTING SPIRAL CORRUGATED PIPE Oct. l5, 192

.Filed July 11. 1928 5 Sheets-Sheet 4 ATTORNEY;v

Oct. l5, 1929# D. B. DlMlcK 1,732,183

i APPARATUS Fon CASTING SPIRAL coRRUGATED PIPE Filed July 11, 1928 5 Sheets-Sheet 5 IN VEN TOR.

D. Jinaik J ATTORNEYv Patented ct. 15, 1929 mais@ o srA'rES]4 DANIEL BAKER. DIMICK, ory BIRMrNeHAivL, AnABAirrA.v

APPARATUS non CASTING SHEA; coRRnGA'rnn nirn `Application filed July 11,

1,544,053, granted*l June 30, 1925; No. 1,544,059, granted June 30, 1925; No. 1,544,060, granted June 30,- 1925; No. 1,544,061, granted` June .30, 1925; go.

1,550,514, granted August 18, 1925; 1,213,760, granted January 23, 1917.

1t is an object of the present'invention to produce a compact, efficient and reliable machine for accomplishing in a commercial: way corrugated cast Vmetal pipe, wherein the `article may be cheaply produced in large quan# tities and with a minimum of labor.

@ther objects of the invention consist in improvingV the method of applying and removing the pattern, of moving the drawing machine from onemolding table to the other, and of conducting the other steps and processes of the method by which the lcorrugated cast metal pipe is secured.

`With the foregoing and other objects in'A View, the invention will be more fully described hereinafter, and will'be more particularly pointed out in the claims appendedv hereto.

In the drawings, wherein like symbols refer to like or correspondingparts throughout the several views,

Figure 1 is a front elevation, with part shown in section, of a molding machine constructed in accordance with the present invention;

Figure 2 is a side view of the same with the mold in place andthe patternshown held above the mold;

Figure 3 is also a side view on an enlarged scale, with part shown in section;

Figure 4 is a plan viewtaken. on enlarged scale, of the drive shaft arrangement;

Fig. 5 is. an end view of the shaft taken from the right in Figure 4; and,

Figure 6 is a longitudinal vertical section taken through the lower portion of the ma- 1928.- Serial 1`4I`o. k291,909;

chine showing the device forshi-fting the carriage fromone molding -tableto the other. Referring more particularlv to the draw-l ings, in Figure 1 two; spaced rotary molding tables 7 andj8 areshown as mounted upon appropriate pedestals. l as positioned in back off' one of= the'tables 7. This carriage 9, asshown in Figures 2 and 3, is adaptedito-slide along the beams or-rails 10 andll for the purpose ofshifting it from oneA table 7 to the other table8. rIihese tables are adaptedy to receive thel molds shown at 12 in F igur'e- 2. The ca rriage supports thecorrugated cylindrical' pattern 13, shown in Figure 2. 'As will be understood 'from my prior patents,` this pattern 13 is adapted to belower-ed into-themold-12. A sandeslinger is thereupon broughtforward andv sandv packed thereby inthe mold at inside and outside of'thefpattern 1.3; The pattern 13 is subsequently removed fromv the packed sand in the mold 12; leavingA a spiral seamless corrugated cavity into which the molten metal is poured to cast thepipe.

The pattern 13 may be 'of the typeV shown in my prior patents aforesaid and it may be supported in any appropriate` manner from the rotary head 15 carried by the vertically movable arm 16: The head is provided with a large gear wheel 17 shown in Figure 3 as disposed in mesh with a pinion 18. The gear wheel 17 is carried on a vertical shaft 1-9 and the pinionupon a shaft 2 0. rEhe pinion is in meshA with a second pinion 21- keyed to-rotate with a vertical drive Vshaft 22butf'arranged to slide longitudinally on the lshaft 22; as becomes necessary in the vertical movement of the arm or head 16 which iscounterbalanced by the counterbalancearrangement indicated generally at23.y

The head or arm 16 isfcarriedfby afgrame2k3 having upper and lower pairs'ofsleeves 24 and 25 positioned to slide upon the gui de rods- 26 and 27 which are mountedin the carriage 9. The frame 23 is also provided with central collars 28. `to slide uponthe drive shaft 22.

At the base of* the drive shaft 22 there is fixed thereon a beveled pinion 2 9 disposed-in mesh with ,a complemental pinion 36 on a shafty 31 shown in Figure 4. This shaft 31V,

rBhe car-ri'age9 is shown Y through the pinions 29 and 30 provides for the rotation of the pattern 13.

The frame 23 is shown in Figure 3 to be provided with racks 32 disposed in mesh with toothed wheels 33 mounted on a shaft 34 in the carriage 9. 0n this shaft 34 is also xed a sprocket 35 engaged by an endless chain 36. The chain is trained at its lower end about the sprocket 37. This sprocket is on a shaft 38 for the worm wheel 39 shown in Figure 4. rThe casing 40 containing the worm wheel is shown in Figure 3.

The worm wheel 39 as shown in Figure 4, is disposed in mesh with a worm 41 on a worm drive shaft 42. This drive shaft 42 is provided with a fixed gear wheel 43 in mesh with a pinion 44 fixed on a shaft 45. The shaft 45 contains loosely thereon the pinion 46 and the gear wheel 47, the pinion and gear wheel respectively having the clutch sections 48 and 49 with a complemental axially slidable splined clutch collar 50 therebetween adapted to engage one clutch member while disengaging the other or to be moved to a neutral position between the two.

The shaft is in axial alignment with the shaft 31 and complemental clutch members 51 and 52 are mounted upon the adjacent ends of these shafts. These clutch elements are fixed to rotate with the shafts but the clutch element 52 is slidable axially to admit of its being shifted into and out of engagement with its complemental clutch member 51. A yoke and handle 53 connect the sliding clutch collars and 52 to enable the simultaneous operation thereof.

The pinion 46 is disposed in mesh with a gear wheel 54 fixed on a shaft 55. The gear wheel 47 is disposed in mesh with a pinion 56 fixed on the shaft 55. This shaft 55 is provided with a sprocket 57 engaged by the drive chain 58. Such chain is driven by the reversible electric or by other motor 59, shown through the bottom portion of the carriage.-

and drives a sprocket 64 on the shaft 65. This shaft 65 carries a bevel gear wheel 66 in mesh with a similar bevel pinion 67. This latter bevel gear is provided with a central nut 68 threaded to engage the threads upon the screw feed shaft 69. The pinion 67 and nut are mounted between the two thrustbearings 70 and 71, shown in Figure 6, which depend from the base of the carriage 9. The screw tion and this shaft extends loosely through the bearings 72 and 73 and outwardly therebeyond. The terminal portions of the shaft are encircled by coil springs 74 and 75 which abut at their inner ends against the bearings and at their outer ends against washers or heads 76 and 77 fixed to the screw feed shaft whereby to cushion the longitudinal thrust of the same and the movement of the carriage.

As shown in Figure 1 the turn tables are provided with internal gears 78 in mesh with pinion 79 upon the upper ends of the vertical shafts 8O and 81. These shafts carry bevel pinions 82 and 83 in mesh respectively with bevel pinions 84 and 85 upon axially aligned shafts 86. These shafts carry the bevel gear wheels 87 engaging with the pinions 88 upon the drive shafts 89 provided with a clutch mechanism 90.

By shifting the clutch mechanism 90 back and forth one or the other turn tables' or 8 may be made to rotate. Any other mechanism for rotating the turn tables may be supplied and the shafts may bedriven by electric or other motor.

ln operation, a flask is placed on one of the turn tables 7 or 8, such for instance as the fiask 12 upon the turn table 8 shown in Figure 2. VThe turn table is secured in anyV appropriate manner against rotary motion. The pattern 13 is secured tothe turning head 15 and the carriage is moved to a position where the pattern 13 is directly above the flask 12. K Y

The carriage is made to move on the tracks 10 and 11 by engaging the clutch 61 whereby the rotation of the drive shaft 55 will be imparted to the shaft 60, shown in Figure 3.

By virtue of the chain 63 and connected sprockets, the pinion shaft 65 is rotated thus `communieating motion to the bevel pinion 67, advancing it along the feed screw 69, and by reason of the end thrust bearings 70 and 71, requiring that the carriage 9 partake of the same motion in a direction longitudinaliy of the feed screw 69. Sudden shocks in starting and stopping are absorbed through the compression spiral springs 74 and 75.

During this longitudinal travel of the carriage 9, the clutches 50 and 52 in Figure 4 may be disengaged.A However, on arriving at the correct position, it becomes necessary to lower the pattern 13 into the flask 12.

his may be done at high speed by engaging the clutch 50 with the clutch element 48 of the loose pinion 46 driven by the large gear wheel 54. This arrangement of gearing requires that the shaft 45 turn many times faster than its driver 55 and a high speed of rotation is communicated through the gear wheels 44 and 43 to the worm shaft 42. The driving of the worm wheel 39 correspondingly drives the chain 36 and the toothed wheels which llO mesh with the racks 32 shown in Figure 3. The electric motor 59, which is reversible, is driven in the proper direction to secure the lowering of the pattern 13. The pattern 13 is not rotated during this lowering movement and it is lowered rapidly. rEhe final setting of tne pattern. may bein low speed. rlhis low speed condition is secured by shifting the clutch 50 into engagement with the clutch element 49 of the loose gear wheel l? meshing with the small pinion on the drive shaft 55. Through this ratio a much slower movement will be imparted to the intermediate l5 and consequently the worm shaft 42 willk be driven slowly. rlhe pattern 13 will also be given a rotary motion due to the engagement of the clutch collar 52 with the clutch element 51. The pattern is then disconnected fror the head 15 and the carriage moved out of the way. Another pattern may be secured in the head and shifted to the other table whereupon a similar operation takes place. The turn table 8 is then permitted to rotate while tempered molding sand is rammed between the pattern and cheek and also between the pattern and arbor. The excess sand is removed and the mold is in condition to have the pattern 13 removed. The arm 16 is then brought over the pattern and is lowered in low speed as above referred to. The head 15 is engaged with the pattern 13 and the motor 59 is reversed. his reverse movement is still continued in low speed7 and the pattern 18 1s rotated while at the same time the arm 16 is lifted, the clutches 50 and 52 being engaged. The turn table 8 is of course secured against rotary motion. The pattern 13 is subjected to a combined rotary and lifting motion synchronized to the lead of the pattern corrugations. The pattern is thus removed from the mold without destroying the mold cavity which is seamless in a cylindrical sense and enables the casting in one piece of the spiral corrugated pipe, the mold 12 being removed to the casting floor for this purpose. The pattern after removal is ready for insertion in another mold undergoing preparation.

It will be seen that in the present apparatus, the pattern may be quickly raised and lowered with the machine in high speed without the turning of the pattern. The pattern may also be raised andlowered slowly while it is subjected to rotary motion, the two being so timed that the vertical drive of the pattern is exactly duplicated by means of the racks and rack gears.

It will be understood that the machine may be utilized in connection with a single mold turn table or with two or more turn tables.

The carriage is provided with locking dogs mounted to reciprocate in guide sleeves 96 and having handles 97. Recesses 98 are provided in the foundation or track for receiving the locking dogs 95 at opposite ends of the movement of the carriage whereby to lalign t-he axis of the pattern with the axis of the mold or flask. These dogs may be withdrawn, by hand before the carriage can be again put into movement.

It will be obvious that many 4changes in the construction, combination and varrangement of parts could be made, which could be used without departing from the sp' 'it of my invention, and l do vnot mean to limit the invention 'to such details, except as particularly pointed out in the claims.

Having thus described my invention, what claim and desire to secure by Letters Patentof the United States is 1. an apparatus for molding spiral corrugated metal pipe comprising a holder for a liask, a rotary and reciprocating support for a pattern, and means for rapidly raising and lowering said support without rotation of the pattern vand for more slowly raising and lowering the support with rotation of the pattern. l

2. An apparatus for molding spiral corrugated metal pipe comprising a reciprocating and rotating supportVf-or a pattern, `and means whereby said support may be reciprocated at high speed without enta-iling rotation of the pattern and whereby 'also the support may be reciprocated more slowly but with turning of the pattern.

3. An apparatus vfor molding spiral corrugated metal pipe comprising a support for a pattern having' vertical sliding movement .and a moven'ient of rotation, a motor, and

connections between said mot-for 'and support for shifting the support back and forth either with or without rotation of the pattern. p

4. An apparatus for molding spiral corrugated metal' pipe comprising a support for a pattern mounted for vertical shifting movement 'and 'for 'horizontal rotary movement, a motor, and connections between said motor and the support `for raising and lowering the patternat slow speed while turning the pattern and at high speed without turning the pattern.

5'. An apparatus for `molding spiral corrugated metal pipe comprising a carriage, a vertically shiftab'le frame on 'the carriage, a rotary head in the frame forl supporting a pattern, and means supported by the carriage for raising and lowering said frame either rapidly or slowly and for rotating saidhead and pattern simultaneously with thev slower movement of the frame. f

6. An apparatus for molding spiral Acorrugated metal pipe comprising a carriage, a frame mountedfor movement therein, a rotary head carried by the frame for supporting a pattern, a motor supported by the carriage, connections between said motor, frame and head for raising `and lowering the frame rapi io idly without rotation of the head and' for raising and lowering the frame slowly with rotation, of the head, and means for shifting the carriage. l

7. An apparatus for molding spiral corrugated metal pipe comprising a carriage, a sliiftable frame therein, a rotary head in the frame, a shaft for driving the rotary head, connections for shifting the frame, and a motor for driving said connections at high speed7 without driving the shaft and at low speed with driving of said shaft.

8. An apparatus for molding spiral corrugated metal pipe comprising a carriage, a shiftable frame therein, a rotary head in the frame for supporting a pattern, a drive shaft for the rotary head, connections for shifting said frame, a motor, and a seleotive'means whereby the motor may drive the connections at high speed without driving the shaft or alternately may drive the connections at low speed with simultaneous driving of the shaft.

9. An apparatus for molding spiral corrugated metal pipe comprising a carriage,V a shiftable frame therein, a rotary head on the frame, a drive shaft for the head with which the frame has sliding movement, a rack on the frame, a drive wheel for meshing with the rack, a motor, and means whereby the motor may drive the'wheel at rapid or slow speeds and may drive the shaft only when driving the wheel at low speed. f

10. An apparatus for molding spiral corrugated metal pipe comprising a carriage, a shiftable frame therein, a rotary head on the frame for carrying the pattern, a motor, a drive shaft driven by the motor, a transmission shaft, high and low selective speed transmission elements between said shafts for driving the transmission shaft, a worm shaft positively driven by said transmission shaft, a worin wheel Connection for driving said frame, a drive shaft for the rotary head, and means whereby said drive shaft may be driven from the transmission shaft whenever the latter is rotated in slow speed. 11. An apparatus for molding spiral corrugated metal pipe Comprising a shiftable carriage, a rotary and reciprocating support for a pattern in the; carriage, a motor in the carriage for driving said support, and connections whereby said motor may shift the carriage.

12. An apparatus for molding spiral corrugated metal pipe comprising a shiftable carriage, a shiftable and rotary support for a pattern therein, a motor in the Carriage for driving and rotating the support, a feed screw below the carriage, a travelling nut gear on the feed screw arranged to move the carriage, and connections between said motor and the nut gear for rotating the latter.

l 13. An apparatusy for molding spiral corrugated metal pipe comprising a shiftable carriage, a shiftable and rotary head thereon for supporting a pattern, a motor in the' carriage for driving and rotating the head, a shaft adapted to be driven by the motor, a pinion shaft driven from said first mentioned shaft and carried by the lower portion of the A carriage, a pinion on said shaft, a nut gear meshing with said pinion, thrust members on th-e carriage extending on opposite sides of said nut gear, a feed screw supported beneath the carriage and engaging said new gear, and means for resiliently supporting n the ends of said feed screw.

14C. An apparatus for molding spiral corrugated metal pipecomprisinga carriage, a

movable pattern carrying frame on the carllO 

